With aspire 9.010 went at the stair tread trying to cut down the machine time and also adding a reverse type cut or climb vs conventional hoping to clean up the cut from the V90 bit as different wood grains act differently when machined (shredded looking)The time has been cut a lot , but I had to do the 2 runs climb and conventional and the wood looks 99% betterlooks like these can be done at less than 10 min